Part A Separate the pennies you have into two groups: one group with pennies dated before 1982 and the other with pennies dated before 1982. Compare the two groups record any similarities or differences in size or appearance that you notice between the groups. (Activity: identifying a substance by its properties)

The pennies are all the same shape and diameter, they are circular and under an inch in diameter. The pennies dated before 1982 are "95 percent copper and 5 percent zinc" and are a darker and duller color than the pennies dated after 1982.

The pennies that are dated after 1982 are "97.5 percent zinc and 2.5 percent copper" and are brighter and shinier than the pennies dated before 1982.

Explanation:

Correct via Edmentum

(make sure to put the answer in your own words, do not copy and paste)

i will, dm me on here.

explanation:

i need some with some bio stuff see if anyone will

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.